Safe protecting device for lamp bulbs with pins and conductors connected directly

ABSTRACT

A safe protecting device for a lamp bulb with pins and conductors connected directly, wherein, two pins of the lamp bulb have exposed sections to be welded together with peeled and naked sections of the conductors; a protecting sheath is provided for assembling the pins of the lamp bulb and the peeled and naked sections of the conductors. The protecting sheath is injection molded to have a predetermined length and is provided with extensions on the front end portion thereof for positioning a part of the lamp bulb. A storing portion is formed behind the front end portion of the protecting sheath for storing the pins of the lamp bulb, the naked sections of the conductors and the welding spots on the front end portion; thereby, an external heat shrinking sleeve can directly contact with the welding spots when it is heat shrunk, thus safety and protecting function of the lamp bulb is strengthened.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the invention

[0002] The present invention is related to a safe protecting device forlamp bulbs with pins and conductors connected directly, and especiallyto a safe protecting device capable of strengthening safety andprotecting function of such style lamp bulbs.

[0003] The lamp bulbs indicated in the present invention are those lampbulbs which are not inserting connected to lamp holders, rather, theyhave their pins and conductors connected directly as decorative lampbulbs for lightening or flashing. Such lamp bulbs are smaller, they areprovided directly at the ends of the conductors, and are in the shapelike crab eyes, thereby, they are called “crab-eye style lamps” in theart.

[0004] 2. Description of the Prior Art

[0005] The conventional structure of such a crab-eye style lamp is madein a factory, such as is shown in FIG. 1, to have an external heatshrinking sheath 12 fixed on a joint section between a bead 10 as a lampbulb and a conductor 11 when in assembling. The internal processingprocedure in assembling further includes welding of the polar pins ofthe bead to the ends of the conductors 11. Then the external heatshrinking sleeve 12 is fixed by heat shrinking. The heat shrinkingsleeve 12 is provided between the hard lamp bulb and the soft conductor,it is often uneven and wrinkled to make the appearance of the whole lampvery ugly. Besides, such structure of the single layered heat shrinkingsleeve has a non ideal safety condition outdoors, it is very hard topass the examination of those countries with more severe standards.

[0006]FIG. 2 shows the structural arrangement of a conventional crab-eyestyle lamp added with an external heat shrinking sleeve, wherein, thetwo pins 13, 14 of the lamp bulb 10 have exposed sections 131, 141 to bewelded together with the peeled and naked sections 16, 17 of theconductor 11 (with the external insulation layer stripped) in additionto a lightening element 15 (such as tungsten). The welding spots 18, 19after condensation will contain rough and sharp nodes on the surfacesthereof during mass production of such inexpensive lamp bulbs.Generally, the heat shrinking sleeve 12 is made from thin film material,when it is heat shrunk at the welding spots 18, 19 with the rough andsharp surfaces, the heat shrinking sleeve 12 is forcedly abutted againstthe welding spots, this may result breakage by piercing, and therebythose countries with more severe standards do not let pass of theproducts of such structure for marketing at all. Surely thickness of theheat shrinking sleeve 12 can be increased to enhance its safety, howeverafter heat shrinking, the lamp bulb 10 and the conductor 11 connectedtherewith having the welding spots 18, 19 with rough and sharp surfacescan still have the probability to result piercing by direct abrading ofthe heat shrinking sleeve when they are pulled up or down along the axisunexpectedly.

[0007] To solve the defect, the half-finished product as shown in FIG. 2can surely be placed in a die to injection mold an external housing tocompletely envelop the above stated welding spots; however, a troubleremains, that is, such processing mode may increase cost of production,and is unsuitable for mass production of such inexpensive lamp bulbs.

SUMMARY OF THE INVENTION

[0008] The object of the present invention is to provide a protectingdevice for lamp bulbs with pins and conductors connected directly, thedevice can prevent a lamp bulb from direct contact with the weldingspots on the rough and sharp surface of the heat shrinking sleeve (whichcontacts with the conductors) after heat shrinking, this can strengthensafety and protecting function.

[0009] To obtain the above stated object, the present invention providesa preferably integrally shaped protecting sheath with extensions on thefront end portion thereof for positioning of a part of a lamp bulb. Thecentral section of the protecting sheath forms a storing portion toreceive therein the pins of the lamp bulb, the conductors and thewelding spots. In the preferred embodiment, the storing portion can be ahollow pipe with a hole or with a first recess and a second recess onthe two lateral sides thereof respectively forming the internal storingportion.

[0010] The present invention will be apparent in its novelty andfeatures after reading the detailed description of the preferredembodiment thereof in reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0011]FIG. 1 is a perspective view of a conventional protecting devicefor a lamp bulb with pins and conductors connected directly;

[0012]FIG. 2 is a perspective view showing the structure of FIG. 1before the heat shrinking sleeve is assembled;

[0013]FIG. 3 is a perspective view of a first preferred embodiment ofthe present invention;

[0014]FIG. 4 is a front view of FIG. 3;

[0015]FIG. 5 is a side view of FIG. 3;

[0016]FIG. 6 is a perspective view showing the structure with the lampbulb and the conductors of FIG. 3 connected with each other;

[0017]FIG. 7 is a perspective view of a second preferred embodiment ofthe present invention;

[0018]FIG. 8 is a perspective view showing the structure with the lampbulb and the conductors of FIG. 7 connected with each other;

[0019]FIG. 9 is a perspective view of a third preferred embodiment ofthe present invention;

[0020]FIG. 10 is a front view of FIG. 9;

[0021]FIG. 11 is a side view of FIG. 9;

[0022]FIG. 12 is a perspective view showing the structure with the lampbulb and the conductors of FIG. 12 connected with each other; and

[0023]FIG. 13 is a perspective view of another preferred embodiment ofthe present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0024] Referring to FIGS. 3-5, in the preferred embodiment of thepresent invention especially suiting two conductors, a protecting sheath30 is provided and can be injection molded from non electric conductivematerial such as plastic to have a predetermined length, the protectingsheath 30 is provided with extensions on the front end portion 31thereof. The front end portion 31 is separated into two tongs 32, 33. Inthis preferred embodiment, distance between the two tongs 32, 33 isabout the diameter of the lamb bulb, the inner surfaces of the tongs 32,33 are preferably arciform to meet the shape of the glassy external wallof the lamb bulb 15.

[0025] The primary feature of the present invention is resided in that,a storing portion is formed behind the front end portion 31 of theprotecting sheath 30 for storing the pins of the lamp bulb, the nakedsections of the conductors and the welding spots on the front endportion 31 of the protecting sheath 30. In this preferred embodiment, acentral section 34 (referring to FIG. 5) of the protecting sheath 30forms two hollow pipes 37, 38 with holes 35, 36.

[0026] As shown in FIG. 6, when the half-finished product as shown inFIG. 2 is assembled in the protecting sheath 30, a part of the lamb bulb15 can be pulled into the space between the two tongs 32, 33 to renderthe bottom surface 150 thereof to abut against the front end portion 31,thereby, the pins 131 of the lamp bulb 15, the naked sections of theconductors 16 and the welding spots 18 as shown are all put in thestoring portion, i.e., in the holes 35, 36 of the two hollow pipes 37,38. In this protecting state, when a heat shrinking sleeve 50 isprocessed with heat shrinking, it will not contact the welding spot 18with a rough and sharp surface at all.

[0027] As shown in FIGS. 7, 8, the above stated structure can also suita set of conductors 110 with three wires. In this preferred embodiment,a protecting sheath 300 can receive the three wires simultaneously justby enlarging one of two hollow pipes 370, 380.

[0028] Referring to FIGS. 9-11 which show another embodiment, wherein, aprotecting sheath 309 can also be injection molded from plastic to besimilarly provided with a front end portion 319, an upper tong 329 and alower tong 339. Behind the front end portion 319, a storing portionwhich is opened is provided. Two opened recesses are provided on each ofthe two lateral sides thereof, one is a shallower first recess 359coincident with the length of the pins of the lamb bulb, the other is adeeper second recess 379 located behind the first recess 359. A steppedportion 399 with a set recessing depth is provided between the two. Asshown in FIG. 12, when the embodiment is in the stage of assembling ahalf-finished product as shown in FIG. 2, the pins 131 of the lamp bulb15 is abutted on the first recess 359, the naked sections of theconductors 16 are abutted on the second recess 379, while the weldingspots 18 is contracted to be abutted on the stepped portion 399 withoutforced contact with the inner surface of the heat shrinking sleeve 50.

[0029] Referring to FIG. 13 showing another embodiment which is similarto the above third embodiment, except that a second recess 379A on oneside herein is enlarged to receive a set of conductors with three wires.

[0030] The above stated improved structure of the present invention canrender the structure to have more even and tidy appearance when theexternal heat shrinking sleeve is heat shrunk by using a protectingsheath, in addition to this, the pins of the lamp bulb, the conductorsand the welding spots are received in and protected by the protectingsheath, the external heat shrinking sleeve directly contacting with thewelding spots with rough and sharp surfaces can avoid the defect ofbreakage by piercing in such contact, thereby, the conventional problemof breakage by piercing can be solved to get a higher safety standardand ideality for use.

[0031] The embodiment cited above is only for illustrating a preferredembodiment of the present invention, it will be apparent to thoseskilled in this art that various modifications or changes can be made tothe elements of the present invention without departing from the spiritand scope of this invention. Accordingly, all such modifications andchanges also fall within the scope of the appended claims and areintended to form part of this invention.

1. A safe protecting device for a lamp bulb with pins and conductorsconnected directly, wherein, two pins of said lamp bulb have exposedsections to be welded together with peeled and naked sections of saidconductors, a protecting sheath is provided for assembling said pins ofsaid lamp bulb and said peeled and naked sections of said conductors,said protecting sheath is injection molded to have a predeterminedlength and is provided with extensions on the front end portion thereoffor positioning a part of said lamp bulb, a storing portion is formedbehind said front end portion of said protecting sheath for storing saidpins of said lamp bulb, said naked sections of said conductors and thewelding spots on said front end portion, thereby, an external heatshrinking sleeve can directly contact with said welding spots when it isheat shrunk, thus safety and protecting function of said lamp bulb isstrengthened.
 2. A safe protecting device for a lamp bulb with pins andconductors connected directly as claimed in claim 1, wherein, saidstoring portion is divided by a central section of said front endportion to form two hollow pipes with holes.
 3. A safe protecting devicefor a lamp bulb with pins and conductors connected directly as claimedin claim 2, wherein, said two hollow pipes are identical by size.
 4. Asafe protecting device for a lamp bulb with pins and conductorsconnected directly as claimed in claim 2, wherein, one of said hollowpipes is larger than the other.
 5. A safe protecting device for a lampbulb with pins and conductors connected directly as claimed in claim 1,wherein, said protecting sheath is opened on both lateral sides thereof,said front end portion forms by dividing of said central section twoopened recesses on each of said two lateral sides thereof, one of saidrecesses is a shallower first recess coincident with the length of saidpins of said lamb bulb, the other of said recesses is a deeper secondrecess located behind said first recess, all said recesses form saidstoring portion.
 6. A safe protecting device for a lamp bulb with pinsand conductors connected directly as claimed in claim 5, wherein, saidtwo recesses are same in shape.
 7. A safe protecting device for a lampbulb with pins and conductors connected directly as claimed in claim 5,wherein, said second recess on one side of said device is enlarged to belarger than another second recess on the other side thereof.
 8. A safeprotecting device for a lamp bulb with pins and conductors connecteddirectly as claimed in claim 1, wherein, said extensions on said frontend portion are arciform tongs meeting the diameter and periphery of theglassy external wall of said lamb bulb.